Hi TC_Berk,
Congratulations, you’re in nearly the same boat as me yesterday. The difference is I chose to not keep old versions of the configs.
Follow this guide:
http://community.wd.com/t5/My-Book-Live/GUIDE-Debrick-MyBookLive-v2-0/td-p/567582
And before you ask further…
I’ve done my share of research and Googling, and… no… There is no way to do that without opening your MBL.
Don’t worry, doing it carefully will minimize damage, probably without damage at all …
Go here for detailed instructions on opening it:
http://forums.whirlpool.net.au/archive/2032705
If you want to save your data, you can do it from within System Recovery CD’s GUI … or basically any ext4-enabled Linux, including Ubuntu. I prefer SysRecCD for its smaller download size ( http://www.sysresccd.org).
And then, use neowiz’s guide for installing Transmission without breaking apache2/php:
http://community.wd.com/t5/My-Book-Live/GUIDE-Install-Transmission-2-77/m-p/558638
Best of luck !